Number of (n+1) X 4 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly two equal edges, and new values 0..3 introduced in row major order.

A206233

Number of (n+1) X 4 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly two equal edges, and new values 0..3 introduced in row major order.

Terms

    a(0) =310a(1) =1136a(2) =4456a(3) =27168a(4) =133392a(5) =607008a(6) =3503136a(7) =17206032a(8) =78302496a(9) =451903008a(10) =2219576592a(11) =10101020448a(12) =58295486496a(13) =286325378832

External references